本蒟蒻调了好久

#include<bits/stdc++.h>
#define ll long long
using namespace std;
inline void read(int &x){
	int f=1;
	char ch=getchar();
	x=0;
	while(ch<'0'||ch>'9'){
		if(ch=='-') f=-1;
		ch=getchar();
	}
	while(ch>='0'&&ch<='9'){
		x=x*10+ch-'0';
		ch=getchar();
	}
	x*=f;
}
int main(){
	int t;
	read(t);
	while(t--){
		int n,k;
		read(n),read(k);
		int ans;
		for(int r=1;r<=floor(k/2)&&r<=n;r++){
			for(ans=1;ans%k!=r;ans++);
		}
		cout<<ans<<endl;
	}
	return 0;
}